Question

X al cuadrado - 4?? Hay que despejar x? Como?

Answer 1

x²=-4

x=√-4

x=√4*(-1)

x=2√-1 ∧ x= -2√-1

Answer 2

${x^2-4=0}\\\\{(x-2)(x+2)=0}\\\\\\{x-2=0}\\{\boxed{x_1=2}}\\\\{x+2=0}\\{\boxed{x_2=-2}}\\\\\\{\mathtt{salu2.}}$